Analog Devices Inc./Maxim Integrated DS1867E-10

Overview

DS1867E-10 from Maxim Integrated (now Analog Devices) is a dual-channel, nonvolatile digital potentiometer with EEPROM wiper storage, 10 kΩ end-to-end resistance per channel, 256-position resolution, and 3-wire serial interface. It operates from a single 5V supply and maintains wiper settings across power cycles for precision analog trimming in industrial sensor conditioning and programmable gain amplifiers.

For engineers reviewing the DS1867E-10 datasheet, DS1867E-10 pinout, DS1867E-10 application, or DS1867E-10 equivalent, key selection considerations include EEPROM endurance (25,000 writes), stacked configuration support (512-step combined resolution), ±0.75 LSB absolute linearity, and cascading capability for multi-device bus control.

Technical Context

The DS1867E-10 implements two independent 256-tap resistor ladders with EEPROM-backed shadow memory that auto-saves wiper positions during power-down when VCC drops below 4.5 V. Its 3-wire serial port (RST/CLK/DQ) uses an active-high RST to enable communication and latches 17-bit data on CLK rising edges - including stack-select bit and both 8-bit wiper values.

It supports stacked operation via SOUT multiplexing (selecting W0 or W1 based on bit-0 of the shift register) and daisy-chain cascading through COUT→DQ propagation (70 ns max delay). The device requires no charge pump, enabling quiet, low-power operation (250–900 µA ICC) while maintaining full analog signal integrity across -40°C to +85°C.

Key Specifications

Pinout & Package

DS1867E-10 is packaged in a 16-pin SOIC (300-mil) surface-mount package with exposed pad not connected. Pin functions are electrically validated per Maxim's DS1867 datasheet Rev 102199.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual digital potentiometer applications.

Compared with AD5232BRUZ10 and MCP42010-I/P, the DS1867E-10 uniquely combines EEPROM-based nonvolatility, hardware-supported stacking (SOUT), and native daisy-chain capability (COUT) in a single 5V 3-wire interface-making it optimal for distributed analog trimming where reliability and bus efficiency are critical.

Availability

DS1867E-10 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, and multi-channel bias control requiring stable component supply, long-term obsolescence management, and guaranteed traceable sourcing.

Supply support for DS1867E-10 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices (acquired Maxim Integrated in 2021) designs high-performance analog, mixed-signal, and RF ICs for precision measurement, industrial automation, and communications infrastructure.

The DS1867E-10 belongs to Maxim's legacy digital potentiometer family engineered for nonvolatile, low-noise analog trimming in embedded systems where EEPROM-backed calibration persistence is mandatory.

FAQ

What is the supply voltage range for the DS1867E-10?

The DS1867E-10 operates from a single 4.5 V to 5.5 V supply (VCC). It does not support ±5 V operation in this variant - that capability applies only to the DS1867 base part without the "E" suffix. The DS1867E-10 is optimized for 5 V systems and includes internal regulation to maintain stable analog ladder performance across the specified range.

Does the DS1867E-10 require external components for EEPROM write functionality?

No, the DS1867E-10 performs automatic EEPROM writes without external components. When VCC drops below 4.5 V, the device detects the power-down condition and initiates an internal auto-store sequence - provided the voltage remains between 4.5 V and 3.0 V for at least 4 ms. This guarantees wiper position retention without firmware intervention or external circuitry.

Can the DS1867E-10 be used in stacked configuration to achieve 20 kΩ total resistance?

Yes, the DS1867E-10 supports hardware stacking: connecting H1 to L0 forms a 20 kΩ series ladder, and the SOUT pin delivers the combined wiper output. The stack-select bit (bit-0 of the 17-bit shift register) determines whether SOUT reflects W0 or W1. This yields 512 effective steps while preserving 10 kΩ per segment's 256-step resolution and linearity.

What is the maximum clock frequency supported by the DS1867E-10 serial interface?

The DS1867E-10 supports a maximum CLK frequency of 10 MHz, with minimum pulse width of 50 ns. Timing parameters including data setup (30 ns), hold (10 ns), and propagation delay (70 ns) are fully characterized across -40°C to +85°C. This allows rapid reconfiguration - e.g., updating both wipers in under 1.7 µs - making the DS1867E-10 suitable for real-time gain adjustment loops.

How many write cycles can the EEPROM in the DS1867E-10 endure?

The EEPROM in the DS1867E-10 is rated for a minimum of 25,000 write cycles under standard conditions (-40°C to +85°C, VCC = 5 V ±10%). Each write corresponds to a full power-down event that triggers auto-store. If wiper values remain unchanged during power cycles, EEPROM wear is avoided - extending functional life well beyond 25,000 cycles in typical calibration applications.